/*
day382 
2020.9.13 
*/
#include<iostream>
#include<vector>
using namespace std;

class Solution {
public:
    int findNumbers(vector<int>& nums) {
		int res=0;
		for(int i=0;i<nums.size();++i)
		{
			if(help(nums[i])%2==0)
			{
				res++;
			}
		}
		
		return res;
    }
    
    int help(int num)
	{
		int res=0;
		while(num)
		{
			res++;
			num/=10;
		}
		return res;
	 } 
};


int main()
{
	return  0;
}


